Electrical Machines What are the starters used for starting of cage motors? DOL starter. Auto transformer starter. All of these. Star-delta starter. DOL starter. Auto transformer starter. All of these. Star-delta starter. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor winding for a 3-phase slip-ring induction motor having delta-connected stator must be connected in delta or star according to need. None of these star. delta. delta or star according to need. None of these star. delta. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two 3-phase AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air-gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductor/slot in a big generator is K times that of the smaller one. The value of K to get equal no load voltage at same frequency is 1/2. 8. 4. 1/4. 1/2. 8. 4. 1/4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of a alternator, if P = number of poles and N = revolution made per second? 120 / PN Hz. 120N / P Hz. 120P / N Hz. PN / 2 Hz. 120 / PN Hz. 120N / P Hz. 120P / N Hz. PN / 2 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which DC motor will have least percentage increase of input current, for the same percentage increase in the torque Compound Wound DC Motor DC Series Motor Separately Excited DC Motor DC Shunt Motor Compound Wound DC Motor DC Series Motor Separately Excited DC Motor DC Shunt Motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When an electric train is moving down a hill, the DC motor will operate as DC shunt generator. DC series generator. DC shunt motor. DC series motor. DC shunt generator. DC series generator. DC shunt motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP